Collapse gd_astpending and gd_reqpri together into gd_reqflags. gd_reqflags
[dragonfly.git] / sys / ddb / db_command.c
CommitLineData
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1/*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 *
26 * $FreeBSD: src/sys/ddb/db_command.c,v 1.34.2.2 2001/07/29 22:48:36 kris Exp $
1de703da 27 * $DragonFly: src/sys/ddb/db_command.c,v 1.2 2003/06/17 04:28:20 dillon Exp $
984263bc
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28 */
29
30/*
31 * Author: David B. Golub, Carnegie Mellon University
32 * Date: 7/90
33 */
34
35/*
36 * Command dispatcher.
37 */
38#include <sys/param.h>
39#include <sys/linker_set.h>
40#include <sys/reboot.h>
41#include <sys/systm.h>
42#include <sys/cons.h>
43
44#include <ddb/ddb.h>
45#include <ddb/db_command.h>
46#include <ddb/db_lex.h>
47#include <ddb/db_output.h>
48
49#include <setjmp.h>
50
51/*
52 * Exported global variables
53 */
54boolean_t db_cmd_loop_done;
55extern struct linker_set db_cmd_set;
56db_addr_t db_dot;
57jmp_buf db_jmpbuf;
58db_addr_t db_last_addr;
59db_addr_t db_prev;
60db_addr_t db_next;
61extern struct linker_set db_show_cmd_set;
62
63static db_cmdfcn_t db_fncall;
64static db_cmdfcn_t db_gdb;
65
66/* XXX this is actually forward-static. */
67extern struct command db_show_cmds[];
68
69/*
70 * if 'ed' style: 'dot' is set at start of last item printed,
71 * and '+' points to next line.
72 * Otherwise: 'dot' points to next item, '..' points to last.
73 */
74static boolean_t db_ed_style = TRUE;
75
76/*
77 * Utility routine - discard tokens through end-of-line.
78 */
79void
80db_skip_to_eol()
81{
82 int t;
83 do {
84 t = db_read_token();
85 } while (t != tEOL);
86}
87
88/*
89 * Results of command search.
90 */
91#define CMD_UNIQUE 0
92#define CMD_FOUND 1
93#define CMD_NONE 2
94#define CMD_AMBIGUOUS 3
95#define CMD_HELP 4
96
97static void db_cmd_list __P((struct command *table,
98 struct command **aux_tablep));
99static int db_cmd_search __P((char *name, struct command *table,
100 struct command **aux_tablep,
101 struct command **cmdp));
102static void db_command __P((struct command **last_cmdp,
103 struct command *cmd_table,
104 struct command **aux_cmd_tablep));
105
106/*
107 * Search for command prefix.
108 */
109static int
110db_cmd_search(name, table, aux_tablep, cmdp)
111 char * name;
112 struct command *table;
113 struct command **aux_tablep;
114 struct command **cmdp; /* out */
115{
116 struct command *cmd;
117 struct command **aux_cmdp;
118 int result = CMD_NONE;
119
120 for (cmd = table; cmd->name != 0; cmd++) {
121 register char *lp;
122 register char *rp;
123 register int c;
124
125 lp = name;
126 rp = cmd->name;
127 while ((c = *lp) == *rp) {
128 if (c == 0) {
129 /* complete match */
130 *cmdp = cmd;
131 return (CMD_UNIQUE);
132 }
133 lp++;
134 rp++;
135 }
136 if (c == 0) {
137 /* end of name, not end of command -
138 partial match */
139 if (result == CMD_FOUND) {
140 result = CMD_AMBIGUOUS;
141 /* but keep looking for a full match -
142 this lets us match single letters */
143 }
144 else {
145 *cmdp = cmd;
146 result = CMD_FOUND;
147 }
148 }
149 }
150 if (result == CMD_NONE && aux_tablep != 0)
151 /* XXX repeat too much code. */
152 for (aux_cmdp = aux_tablep; *aux_cmdp != 0; aux_cmdp++) {
153 register char *lp;
154 register char *rp;
155 register int c;
156
157 lp = name;
158 rp = (*aux_cmdp)->name;
159 while ((c = *lp) == *rp) {
160 if (c == 0) {
161 /* complete match */
162 *cmdp = *aux_cmdp;
163 return (CMD_UNIQUE);
164 }
165 lp++;
166 rp++;
167 }
168 if (c == 0) {
169 /* end of name, not end of command -
170 partial match */
171 if (result == CMD_FOUND) {
172 result = CMD_AMBIGUOUS;
173 /* but keep looking for a full match -
174 this lets us match single letters */
175 }
176 else {
177 *cmdp = *aux_cmdp;
178 result = CMD_FOUND;
179 }
180 }
181 }
182 if (result == CMD_NONE) {
183 /* check for 'help' */
184 if (name[0] == 'h' && name[1] == 'e'
185 && name[2] == 'l' && name[3] == 'p')
186 result = CMD_HELP;
187 }
188 return (result);
189}
190
191static void
192db_cmd_list(table, aux_tablep)
193 struct command *table;
194 struct command **aux_tablep;
195{
196 register struct command *cmd;
197 register struct command **aux_cmdp;
198
199 for (cmd = table; cmd->name != 0; cmd++) {
200 db_printf("%-12s", cmd->name);
201 db_end_line();
202 }
203 if (aux_tablep == 0)
204 return;
205 for (aux_cmdp = aux_tablep; *aux_cmdp != 0; aux_cmdp++) {
206 db_printf("%-12s", (*aux_cmdp)->name);
207 db_end_line();
208 }
209}
210
211static void
212db_command(last_cmdp, cmd_table, aux_cmd_tablep)
213 struct command **last_cmdp; /* IN_OUT */
214 struct command *cmd_table;
215 struct command **aux_cmd_tablep;
216{
217 struct command *cmd;
218 int t;
219 char modif[TOK_STRING_SIZE];
220 db_expr_t addr, count;
221 boolean_t have_addr = FALSE;
222 int result;
223
224 t = db_read_token();
225 if (t == tEOL) {
226 /* empty line repeats last command, at 'next' */
227 cmd = *last_cmdp;
228 addr = (db_expr_t)db_next;
229 have_addr = FALSE;
230 count = 1;
231 modif[0] = '\0';
232 }
233 else if (t == tEXCL) {
234 db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0);
235 return;
236 }
237 else if (t != tIDENT) {
238 db_printf("?\n");
239 db_flush_lex();
240 return;
241 }
242 else {
243 /*
244 * Search for command
245 */
246 while (cmd_table) {
247 result = db_cmd_search(db_tok_string,
248 cmd_table,
249 aux_cmd_tablep,
250 &cmd);
251 switch (result) {
252 case CMD_NONE:
253 db_printf("No such command\n");
254 db_flush_lex();
255 return;
256 case CMD_AMBIGUOUS:
257 db_printf("Ambiguous\n");
258 db_flush_lex();
259 return;
260 case CMD_HELP:
261 db_cmd_list(cmd_table, aux_cmd_tablep);
262 db_flush_lex();
263 return;
264 default:
265 break;
266 }
267 if ((cmd_table = cmd->more) != 0) {
268 /* XXX usually no more aux's. */
269 aux_cmd_tablep = 0;
270 if (cmd_table == db_show_cmds)
271 aux_cmd_tablep =
272 (struct command **)&db_show_cmd_set.ls_items[0];
273
274 t = db_read_token();
275 if (t != tIDENT) {
276 db_cmd_list(cmd_table, aux_cmd_tablep);
277 db_flush_lex();
278 return;
279 }
280 }
281 }
282
283 if ((cmd->flag & CS_OWN) == 0) {
284 /*
285 * Standard syntax:
286 * command [/modifier] [addr] [,count]
287 */
288 t = db_read_token();
289 if (t == tSLASH) {
290 t = db_read_token();
291 if (t != tIDENT) {
292 db_printf("Bad modifier\n");
293 db_flush_lex();
294 return;
295 }
296 db_strcpy(modif, db_tok_string);
297 }
298 else {
299 db_unread_token(t);
300 modif[0] = '\0';
301 }
302
303 if (db_expression(&addr)) {
304 db_dot = (db_addr_t) addr;
305 db_last_addr = db_dot;
306 have_addr = TRUE;
307 }
308 else {
309 addr = (db_expr_t) db_dot;
310 have_addr = FALSE;
311 }
312 t = db_read_token();
313 if (t == tCOMMA) {
314 if (!db_expression(&count)) {
315 db_printf("Count missing\n");
316 db_flush_lex();
317 return;
318 }
319 }
320 else {
321 db_unread_token(t);
322 count = -1;
323 }
324 if ((cmd->flag & CS_MORE) == 0) {
325 db_skip_to_eol();
326 }
327 }
328 }
329 *last_cmdp = cmd;
330 if (cmd != 0) {
331 /*
332 * Execute the command.
333 */
334 (*cmd->fcn)(addr, have_addr, count, modif);
335
336 if (cmd->flag & CS_SET_DOT) {
337 /*
338 * If command changes dot, set dot to
339 * previous address displayed (if 'ed' style).
340 */
341 if (db_ed_style) {
342 db_dot = db_prev;
343 }
344 else {
345 db_dot = db_next;
346 }
347 }
348 else {
349 /*
350 * If command does not change dot,
351 * set 'next' location to be the same.
352 */
353 db_next = db_dot;
354 }
355 }
356}
357
358/*
359 * 'show' commands
360 */
361
362static struct command db_show_all_cmds[] = {
363#if 0
364 { "threads", db_show_all_threads, 0, 0 },
365#endif
366 { "procs", db_ps, 0, 0 },
367 { (char *)0 }
368};
369
370static struct command db_show_cmds[] = {
371 { "all", 0, 0, db_show_all_cmds },
372 { "registers", db_show_regs, 0, 0 },
373 { "breaks", db_listbreak_cmd, 0, 0 },
374#if 0
375 { "thread", db_show_one_thread, 0, 0 },
376#endif
377#if 0
378 { "port", ipc_port_print, 0, 0 },
379#endif
380 { (char *)0, }
381};
382
383static struct command db_command_table[] = {
384 { "print", db_print_cmd, 0, 0 },
385 { "p", db_print_cmd, 0, 0 },
386 { "examine", db_examine_cmd, CS_SET_DOT, 0 },
387 { "x", db_examine_cmd, CS_SET_DOT, 0 },
388 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
389 { "set", db_set_cmd, CS_OWN, 0 },
390 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
391 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
392 { "delete", db_delete_cmd, 0, 0 },
393 { "d", db_delete_cmd, 0, 0 },
394 { "break", db_breakpoint_cmd, 0, 0 },
395 { "dwatch", db_deletewatch_cmd, 0, 0 },
396 { "watch", db_watchpoint_cmd, CS_MORE,0 },
397 { "dhwatch", db_deletehwatch_cmd, 0, 0 },
398 { "hwatch", db_hwatchpoint_cmd, 0, 0 },
399 { "step", db_single_step_cmd, 0, 0 },
400 { "s", db_single_step_cmd, 0, 0 },
401 { "continue", db_continue_cmd, 0, 0 },
402 { "c", db_continue_cmd, 0, 0 },
403 { "until", db_trace_until_call_cmd,0, 0 },
404 { "next", db_trace_until_matching_cmd,0, 0 },
405 { "match", db_trace_until_matching_cmd,0, 0 },
406 { "trace", db_stack_trace_cmd, 0, 0 },
407 { "call", db_fncall, CS_OWN, 0 },
408 { "show", 0, 0, db_show_cmds },
409 { "ps", db_ps, 0, 0 },
410 { "gdb", db_gdb, 0, 0 },
411 { (char *)0, }
412};
413
414static struct command *db_last_command = 0;
415
416#if 0
417void
418db_help_cmd()
419{
420 struct command *cmd = db_command_table;
421
422 while (cmd->name != 0) {
423 db_printf("%-12s", cmd->name);
424 db_end_line();
425 cmd++;
426 }
427}
428#endif
429
430/*
431 * At least one non-optional command must be implemented using
432 * DB_COMMAND() so that db_cmd_set gets created. Here is one.
433 */
434DB_COMMAND(panic, db_panic)
435{
436 panic("from debugger");
437}
438
439void
440db_command_loop()
441{
442 /*
443 * Initialize 'prev' and 'next' to dot.
444 */
445 db_prev = db_dot;
446 db_next = db_dot;
447
448 db_cmd_loop_done = 0;
449 while (!db_cmd_loop_done) {
450
451 (void) setjmp(db_jmpbuf);
452 if (db_print_position() != 0)
453 db_printf("\n");
454
455 db_printf("db> ");
456 (void) db_read_line();
457
458 db_command(&db_last_command, db_command_table,
459 (struct command **)&db_cmd_set.ls_items[0]);
460 }
461}
462
463void
464db_error(s)
465 char *s;
466{
467 if (s)
468 db_printf("%s", s);
469 db_flush_lex();
470 longjmp(db_jmpbuf, 1);
471}
472
473
474/*
475 * Call random function:
476 * !expr(arg,arg,arg)
477 */
478static void
479db_fncall(dummy1, dummy2, dummy3, dummy4)
480 db_expr_t dummy1;
481 boolean_t dummy2;
482 db_expr_t dummy3;
483 char * dummy4;
484{
485 db_expr_t fn_addr;
486#define MAXARGS 11 /* XXX only 10 are passed */
487 db_expr_t args[MAXARGS];
488 int nargs = 0;
489 db_expr_t retval;
490 typedef db_expr_t fcn_10args_t __P((db_expr_t, db_expr_t, db_expr_t,
491 db_expr_t, db_expr_t, db_expr_t,
492 db_expr_t, db_expr_t, db_expr_t,
493 db_expr_t));
494 fcn_10args_t *func;
495 int t;
496
497 if (!db_expression(&fn_addr)) {
498 db_printf("Bad function\n");
499 db_flush_lex();
500 return;
501 }
502 func = (fcn_10args_t *)fn_addr; /* XXX */
503
504 t = db_read_token();
505 if (t == tLPAREN) {
506 if (db_expression(&args[0])) {
507 nargs++;
508 while ((t = db_read_token()) == tCOMMA) {
509 if (nargs == MAXARGS) {
510 db_printf("Too many arguments\n");
511 db_flush_lex();
512 return;
513 }
514 if (!db_expression(&args[nargs])) {
515 db_printf("Argument missing\n");
516 db_flush_lex();
517 return;
518 }
519 nargs++;
520 }
521 db_unread_token(t);
522 }
523 if (db_read_token() != tRPAREN) {
524 db_printf("?\n");
525 db_flush_lex();
526 return;
527 }
528 }
529 db_skip_to_eol();
530
531 while (nargs < MAXARGS) {
532 args[nargs++] = 0;
533 }
534
535 retval = (*func)(args[0], args[1], args[2], args[3], args[4],
536 args[5], args[6], args[7], args[8], args[9] );
537 db_printf("%#lr\n", (long)retval);
538}
539
540/* Enter GDB remote protocol debugger on the next trap. */
541
542dev_t gdbdev = NODEV;
543cn_getc_t *gdb_getc;
544cn_putc_t *gdb_putc;
545
546static void
547db_gdb (dummy1, dummy2, dummy3, dummy4)
548 db_expr_t dummy1;
549 boolean_t dummy2;
550 db_expr_t dummy3;
551 char * dummy4;
552{
553
554 if (gdbdev == NODEV) {
555 db_printf("No gdb port enabled. Set flag 0x80 on desired port\n");
556 db_printf("in your configuration file (currently sio only).\n");
557 return;
558 }
559 boothowto ^= RB_GDB;
560
561 db_printf("Next trap will enter %s\n",
562 boothowto & RB_GDB ? "GDB remote protocol mode"
563 : "DDB debugger");
564}